66773161 has 24 divisors (see below), whose sum is σ = 87335360. Its totient is φ = 49704192.

The previous prime is 66773159. The next prime is 66773177. The reversal of 66773161 is 16137766.

It is not a de Polignac number, because 66773161 - 2¹ = 66773159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66773161.

It is not an unprimeable number, because it can be changed into a prime (66773111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25030 + ... + 27568.

Almost surely, 2^66773161 is an apocalyptic number.

It is an amenable number.

66773161 is a deficient number, since it is larger than the sum of its proper divisors (20562199).

66773161 is a wasteful number, since it uses less digits than its factorization.

66773161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2593 (or 2576 counting only the distinct ones).

The product of its digits is 31752, while the sum is 37.

The square root of 66773161 is about 8171.4846264311. The cubic root of 66773161 is about 405.6959248582.

The spelling of 66773161 in words is "sixty-six million, seven hundred seventy-three thousand, one hundred sixty-one".